Benzoquinone ansamycin 17AAG binds to mitochondrial voltage-dependent anion channel and inhibits cell invasion.
In: Proceedings of the National Academy of Sciences of the United States of America, Jg. 108 (2011-03-08), Heft 10, S. 4105-10
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Zugriff:
Geldanamycin and its derivative 17AAG [17-(Allylamino)-17-demethoxygeldanamycin, telatinib] bind selectively to the Hsp90 chaperone protein and inhibit its function. We discovered that these drugs associate with mitochondria, specifically to the mitochondrial membrane voltage-dependent anion channel (VDAC) via a hydrophobic interaction that is independent of HSP90. In vitro, 17AAG functions as a Ca(2+) mitochondrial regulator similar to benzoquinone-ubiquinones like Ub0. All of these compounds increase intracellular Ca(2+) and diminish the plasma membrane cationic current, inhibiting urokinase activity and cell invasion. In contrast, the HSP90 inhibitor radicicol, lacking a bezoquinone moiety, has no measurable effect on cationic current and is less effective in influencing intercellular Ca(2+) concentration. We conclude that some of the effects of 17-AAG and other ansamycins are due to their effects on VDAC and that this may play a role in their clinical activity.
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Benzoquinone ansamycin 17AAG binds to mitochondrial voltage-dependent anion channel and inhibits cell invasion.
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Autor/in / Beteiligte Person: | Xie, Q ; Wondergem, R ; Shen, Y ; Cavey, G ; Ke, J ; Thompson, R ; Bradley, R ; Daugherty-Holtrop, J ; Xu, Y ; Chen, E ; Omar, H ; Rosen, N ; Wenkert, D ; Xu, HE ; Vande Woude, GF |
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Zeitschrift: | Proceedings of the National Academy of Sciences of the United States of America, Jg. 108 (2011-03-08), Heft 10, S. 4105-10 |
Veröffentlichung: | Washington, DC : National Academy of Sciences, 2011 |
Medientyp: | academicJournal |
ISSN: | 1091-6490 (electronic) |
DOI: | 10.1073/pnas.1015181108 |
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